Henry t



(No Model I H'. ,T; MOODY. FUSIBLB JOINT.

-Patented July 7, 1896.

lowing the links to separate,

UNITED STATES HENRY 'r. MOODY, or NEWBURYPORT, MAsjsAonUsErtrs, AssIeNoR TO IRING COMPANY, or SAME "PLACE.

VICTOR MANUFACT PATENT OFFICE.

FUSIBLE'JOINT.

SPECIFICATIQN forming part of Letters Patent No. 563,394, dated- July 7, 1896.

A plication filed June 13, l896. Serial No. 552374. (No model.)

To all whom it may concern:

Be it known that I, HENRY T. MOODY, acitizen of the United States,residingat Newburyport, in the county of Essex and State of Massachusetts, have invented a new and useful Improvement in Fusible Joints, of which the following is a full, clear,'and exact descrip: tion, reference being had to the accompanying drawings, formingapart of this specification, in explaining its nature.

My invention relates to that kind of fusible joint where two links are soldered'together, the action of heat melting the solder and aland especially to a certain construction of one of the links so that there is no danger of the links being separated ex cept by the action of heat.

as shown in Fig. 5.

.allel to and at a short stance, two ends of a In the drawings, Figure 1 represents a view in plan of one of the links, showing the details of my construction. Fig. 2 is a similar view of the other link. Fig. 3 is a side View of the link represented in Fig. 1. Fig. 4 is a similar view of the link represented in Fig. 2.

Fig. 5 shows the links united together by solder. Fig. 6 is a side View of the two links when soldered together. Fig. 7 shows two links sol dered together, the construction being slightly different from that shown in Fig.6.. Fig. 8. represents a method of attachment of m ylinks in a case where the strain to be resisted is a compressed strain. Fig. 9 shows a modified form of one of the links, to which reference is hereinafter made.

A represents a link having the shoulder C, which is adapted to coverover the end D of the link B when the two are soldered together, The shoulder O is made, as shown in Fig. 3, by turning back the proj'ection a? of the link'A on itself, and thus forming the lip a, which is preferably made pardistance from the projection a Another form of the shoulder C is shown in Fig. 7, where the lip a is placed close to the projection of, leaving no space be tween. In each of the links A B there are holes E, to which may be attached, for inchain holding open adoor, as shown in Fig. -5.' 1

The shoulder G is of great service in taking the strain from the solder, and-when made in reaching this result is shown which the edge of the companion link form shown in Figs. 3 and 6 also serves to keep thelinks close together, and thus reinforces the solder as a means of connection between. the links. This is not the case when the shoulder is made as shown in Fig. '7, and I prefer this construction. Another way of in Fig. 9-, where the shoulder C is formed by the depression of one portion of the link A in relation toanother, or by striking out the part which forms the shoulder, so as to form what might'be termed a bend. This construction permits the two. parts of the link to separate in two ways when the solder is melted. 7 When it is desired to oppose the fusible joint to a force which tends to push the links toward each other rather than to draw them THE apart, the joint may be attached in the manner shown in Fig. 8 by a combination of two curved levers F G, pivoted to each other at H. The ends f g of the levers are received in the slots E of the links, and when the solder connecting the links is melted the ends of the levers will no longer be engaged with the slots, but will be pushed apart by-the force of water in the pipe J. I have shown this method of attachment merely as an instance of one manner of adapting my fusible joint; but I would not be understood as limitingmyself to this method of attachment.

It will be seen that myfusible joint can be very cheaply and easily made and at the same time that it will be very serviceable. The simplicity of its manufacture is thoughtto be a decided improvement over similar articles which have been used before.

' Having thus fully described my invention, I claim and desire to secure by Letters Patent of the United States-- v 9 1. In a fusible joint, the combination of two links adapted to be placed face to face, one having a narrow shoulder at one end, against bears, and the links being arranged to extend by each other, each link having a hole which is out of line with a median line drawn through the shoulder lengthwise the portions of the link in line therewith, and which 'holes connect the joint with a fire-door or other apparatus', all as and for the purposes described.

2. In a fusible link, the combination of the link A formed as described, and having the line of the-edge which bears againstsaid shoulshoulder C at one end and the hole E at the der, the two links being held one to the other, 10 other end, out of line with a median line as specified, and adapted to be Separated as drawn lengthwise the link through the center indicated. of said shoulder, the link B formedas de- IIEKRY T. MOODY, -ecriloed, having the edge D at one end ara In preseneeof- 1 i ranged to rest against the shoulder G and the JOHN C. CURRIER, hole E at the same end but out of the median 1 o i (5. K. DALRYMPLE. 

